Created attachment 232657[details]
testcase 2
The current testcase is invalid. integral is not stretchy by default per the op dict, so it should not stretch.
I attach a correct testcase testing either
- that integrals in display style are drawn larger (they are largeop per the op dict)
- integrals with stretchy="true" next to a tall <mspace/> stretch.
This works on Linux (and assumes that Latin Modern fonts are installed).
Anyway, the bug was about inconsistencies between msubsup/msub/msup, which should not happen anymore since they all use a RenderMathMLScripts.